Door-bell



(Nomodel.)

W. B. ATKINSON.

DOOR BELL.

No. 391,108. A Patented Oct. 16, 1888.

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VILLIAM BROVNLOW ATKINSON, OF FRANKLIN, KENTUCKY.

DOOR-BELL.

SPECIFICATION forming part of Letters Patent No. 391,108. dated October16, 1888.

(No model.)

To all whom it may concern.-

Be it known that I, WILLIAM BROWNLOW ATKINSON, of Franklin, in thecounty of Simpson and State of Kentucky, have invented a new and usefulImprovement in Door-Bells, of which the following is a specification.

My invention is an improvement in that class of door-bells in which thegong or bell proper is sounded by the mere turning of a crank-handle. Iemploy one or more pivoted hammers that revolve with the shaft whichpasses through a door, and to whoseinner end a crank or handle isapplied. These hammers swing freely and strike the gong by the action ofgravity. The disk or other part to which the hammers are pivoted, andalso the gong, are adjustable on the said shaft lengthwise thereof, andare thus adapted to be set at any required distance from the handle toaccommodate doors of different thicknesses.

The details of construction and operation of parts are as hereinafterdescribed, and shown in accompanying drawings, in which- Figure l is avertical central section of my improved bell, showing it applied to adoor. Fig. 2 is a perspective view of the same parts. Fig. 3 is asection on line a: x, Fig. l. Fig. 4 is a perspective view of one oftheparts of the bell detached and enlarged.

The shaft or spindle A passes through the door B. A crank or handle, c,is secured to the outer end of the same by means of a clampserew, andthe other end, b, which is screwthreaded, extends a distance of two ormore inches from the inner surface of the door. On this screw-threadedportion I mount the gong C and a disk carrying thegravityhammers D. Thelatter are pivoted to the disk E, which is fixed on aninternally-threaded sleeve or tube, F, that is screwed on the shaft, andmay thus be adj usted along the same as required to accommodate doors ofdifferent thicknesses. The sleeve alsor serves as a stop to limit theplay of the shaft through the door. The sleeve may be temporarilyclamped immovably by a screw or other device, if required. The gong orbell proper, C, also screws on the shaft, and is thus adjustable likethe said disk E and for the same reason.

To hold the gong C fixed on the shaft A, and also for the sake ofornamental appearance, I apply a conical or acorn-shaped nut, G, to theend of the shaft A.

It will be seen, Fig. 3, that each hammerD has two striking-points orheads. The arm or stem d of each hammer-head is pivoted on a fixed stud,e, projecting from the inner face of the disk E and located near itsperiphery, so that the several hammers swing free in a plane parallel tothe disk. The studs e are of course placed equidistantly from eachother. In case but one hammer is employed, a radial arm maybesubstituted for the disk. On opposite sides of each stud e are stop-pinsf, which serve to limit the movement ofthe hammers, so that while theelasticity of the pins and ham mer-arms g allows their heads to strikethe gong the heads do not drag or remain in contact with it.

V[llo render the operation of the door-bell m'ore clear, I will statethat upon turning the shaft A by means of the crank or liandlea the gongC and hammer-disk E revolve with it. If the revolution be rapid,centrifugal action throws the hammers successively outward. If therevolution be slow, they fall slowly from one position to the other andstrike the gong resounding blows. As before intimated, the momentum ofthe hammer-heads, acquired while swinging from one position to theother, enables them to overcome the elastic resistance of their own armsand that of the stop-pins, and thus strike the gong at each alternatevibration.

What I claim is- 1. In a door-bell, the combination, with a revolvingshaft having a crank, of a gong through which said shaft passes and oneor more hammers which are pivotall y connected with said shaft andarranged within the gong, substantially as shown and described, wherebythe hammers are adapted to strike the gong when the shaft is rotated, asspecified.

2. In a door-bell, the combination, with a crank-shaft having one endscrew-threaded and a gong mounted thereon, of a disk fixed on a tubewhich screws on said shaft, and hammers pivoted to the disk,substantially as shown and described, whereby said disk is adapted foradjustment lengthwise of the shaft, as specified.

3. In a door-bell, the combination, with the ICO Arotating crank-shaftand a gong and disk mounted thereon, the disk being inelosed by thegong, of one or more hammers which are pivoted to the disk near itsedge, and the stop- 5 pins affixed to said disk on opposite sides of thehammer-pivots, as and for the purpose specified.

thereon, and the latter inoiosed by the former, t of the hammers whichare pivoted near the outer` edge of said disk, as shown and described,whereby they are adapted to operate on the gong by gravity, asspecified.

- WILLIAM BROWNLOW ATKINSON.

. Witnesses:

4. In a door-bell, the Combination, with the W. S. T. BAILEY, rotatingshaft and a gong and ldisk mounted R. P. FINN.

